Apparatus for coating paper



(No Model.)

I. P. BUFFINGTON & J. T. SUTPHEN. APPARATUS FOR COATING PAPER. No.520,402. Patented May 22, 1894.

FRANK PEARLEE BUFFINGTON AND JOHN THOMAS SU'IPHEN, or MIDDLE- TOWN,01110.

APPARATUS FOR COATING PAPER.

SPECIFICATION forming part of Letters Patent No. 520,402, dated May 22,1894.

Application filed May 1, 1893. Serial No. 4=72.4=73. (N0 model.)

To all whom it may concern:

Be it known that we, FRANK PEARLEE BUFFINGTON and JOHN THOMAS SUTPHEN,citizens of the United States, residing at Middletown, in the county ofButler and State of Ohio, have jointly invented a new and usefulImprovement in Apparatus for Coating Paper, of which the following is aspecification.

. Our invention relates to apparatus for coating one or both surfaces ofpaper, or other similar fabric, which will be fully hereinafterdescribed and particularly pointed out in the claims.

In the drawings, accompanying this specification, Figure 1 isalongitudinal elevation, in both diagram and cross-section, showing anordinary double-deck drying-machine used in paper-manufacture, and oneform of apparatus devised by us for applying the said coating to oneface of the paper, said coating device being mounted on said drier andpractically forming a part thereof in our construction herein; and Fig.2, a similar view, but with the first three drier-rolls to the right,the press rolls, the upper tier of drier-rolls and upper coatingdevice(seen in Fig. 1) omitted, and showing two additional drier-rolls to the1eft, and our lower coating-device for applying the glaze to the otherface of the paper. The mechanism shown in this view may be so arrangedas to be really a continuation of that shown in Fig. 1, except that itis located in advance of the calender rolls, as it is intended that themachine shall be adapted to coat one or both sides or faces of the paperin one continuous passage through the machine intermediate the press andcalender rolls, and Fig. 3 is a plan view to show more clearly the meansfor supporting the brushes for applying the glaze or other material.

The principal object of our invention is to apply the glaze or othermaterial in a cheap and expeditious manner without the use of extra andcostly mechanism.

In carrying out our invention we mount a transverse vat 0r trough(containing the liquid glaze, or other surfacing-matter to be applied)on the supporting drier-frame adjacent the lower portion of an upperdrier cylinder or drum. A pair of rotary, circular-brushes is mounted ina suitable frame above said vat or trough, parallel both therewith andwith said drier-cylinder, and a series of endless chains or belts areapplied to sprocket-wheels or pulleys on the shafts of said brushes tooperatively-connect them with a driving-wheel on the shaft of one of thelower drier cylinders most convenient, the latter (said beltarrangement) being seen in dotted-lines in Fig. 1. One of saidcircularbrushes rotates slightly within said vat, taking or carryingglaze therefrom and applying it by peripheral contact to thepaperpassing over the adjacent cylinder, and the other or accompanyingrotary, circular-brush in said frame, uniformly and smoothly spreadingor distributing said glaze over the surface of the paper.

We have shown a glazedevice comprising a vat and accompanying carrierand smoothing brushes, adjacent both an upper and a lower drum, wherebyone or both faces of the paper may be coated in the drier. Both sets maybe obviously contained in a paper-drier, and operated singly ortogether, or but a single vat and accompanying brushes supplied, asdesired.

Instead of using circular bristle-brushes, as shown, it is obvious thatrollers of any suitable material and construction could be used to applyand distribute the glaze. It is also obvious that any suitablewell-known means (such as ordinary doctors) may be used or supplied inconnection with the carrier-brush to remove superfluous glaze from saidbrush in advance of the glaze being applied to the surface of the paper,and, as such an appliance is very simple and common, it is not deemednecessary to'show it in the drawings to detract from or obscure theother more vital and essential parts.

In the accompanying drawings, A represents the supporting-frame, (a verysmall, broken off portion only being deemed necessary to show;) B, eachone of the lower tier or series of ordinary drier-cylinders; 0, each oneof the upper tier of drier-cylinders; D, D, the ordinary press-rollsbetween which the paper travels or passes, as customary, on its way tothe drier; E, vertical series of the usual calender-rolls between whichthe paper travels after being first glazed or otherwise coated in itsinitial passage through the drier,

as hereinbefore described; a, the usual endless web 'or carrier,(tension device therefor not shown;) I), each of the web idler-rolls; 0,each of the paper idler-rolls; F, the rotary, glaze carrier and applyingbrush journaled at its ends in the arms (I, which project from the frameA; G, the rotary, glaze spreading and smoothing brush journaled atitsendsin the arms e, which also project from the frame A; H, the glaze orcoating trough or vat, hung on the frame A beneath the carrierbrush F,convenient for the latter to charge or feed therefrom; f, a pulley(dotted) on a lower drier-cylinder shaft; g, a pulley (dotted) on theshaft or carrier-brush F; h, a

driving-belt (dotted) running over said pul-- leysfand g; and i, a belt(dotted) running over pulley g and a pulley (not seen) on the shaft ofthe smoothing-brush G.

The arrows adjacent the several parts indicate their respectivedirections of movement.

In practice, (for fine-paper,) rolls or very fine brushes will be usedto apply the glaze or other coating, and coarse brushes only, for coarsepaper. The journals of both the carrier and smoothing-brushes arepreferably mounted in the customary, ordinary adjustable bearings (notshown) whereby allowance is made for varying thicknesses of paper andwear of the bristles or faces of the glaze-distributers.

In Fig. 2, we show how our coating-device is mounted at the bottom ofthe machine adjacent a lower drier-roll, whereby the glaze is applied tothe other side of the paper as it passes through the drier. Thedrier-rolls l and 2 of Fig. 1 are shown in this view, and additionallower drier-rolls 3 and 4: also shown, to complete the drying-operationafter said lower coating-device'has performeditssaidfunction. Thereference letters and figures of Fig. 1 are carried out in this Viewexcepting those of the coating-device all of which are primed and thebelt or chain f crossed so as to communicate the proper motion from thepulley on roll 2 to the pulley on the shaft of brush F. The web a inthis View is moved or directed back to roll 1, and no web carried overthe rolls 2, 3 and 4, thus permitting the coating-devices to apply theglaze without interference of said web.

In practicing our invention the glaze or coating is preferably appliedbefore the paper becomes thoroughly dry, but it is obvious that it maybe done in a continuous passage through the machine, after it is dry,before reaching the calender-rolls. It is also obvious that any suitablemeans may be used for applying the coating to one surface of the paperwhile the opposite surface is in contact with aheated cylinder.

. WVe claim-- 1. In a paper making machine, the combination, with adrier provided with the customary heated cylinders or drums, of acoating apparatus adjacent the surface of one of the drums, and adaptedto apply the coating to one surface of the paper while the oppositesurface is in contact with the heated surface of said drum,substantially as set forth.

2. In a paper making machine, the combi-- nation, with a drier providedwith the customary heated cylinders or drums, of a trough or vatadjacent to one of the drums, a rotary cylindrical brush mountedadjacentto the vat, and to one of the cylinders and adapted to apply thecoating to one surface of the paper while the opposite surface is incontact with the heated surface of said drum, substantially as setforth.

3. In a paper making machine, the combination with a drier provided withthe customary heated cylinders or drums, of a glaze or coating trough orvat adjacent to one of the drums, a rotary carrier-brush operating insaid vat and in contact with the surface of the passing paper, adistributing and smoothing rotary brush, and suitable mechanism fordriving said brushes and distributing the coating over said surface ofthe paper during its onward passage through said drier, substantially asherein set forth.

4. In a paper making machine, the combination, with the drier, providedwith the customary heated cylinders or drums, of a trough adjacent toone of the drums, a pair of arms at each side of the frame, a coatingroller journaled in two of the arms upon opposite sides of the frame,and a spreading roller journaled in the other arms, substantially as setforth.

FRANK PEARLEE BUFFINGTON. JOHN THOMAS SUTPIIEN.

Witnesses:

G. C. DONLEY, FRANK J. STEWART.

IOC

